Delay mechanism



June 5, 1928.

' J. A. 'JENSEN DELAY MECHANISM Filed March 7, 1923 5 Sheets-Sheet lfiwntor: kfcmzzs QK/CZTISZTZ/ June 5, 1928. 1,672,384

J. A. JENSEN v DELAY MECHANISM 72 Iiwawtor:

June 5, 1928. 1,672,384 J. A. JENSEN DELAY MECHANISM 7 Filed March 7.1923 5 eets-Sheet 3 l avnntor'z JWS CZJL sen J. A. JENSEN DELAYmscrmnrsu' Filed 'grch 7, s sheets-sheet 5 June 5, IQZS. 1,672,384

Patented June 5, 1928.

' JAMES A. JENSEN, F PHILADELPHIA, PENNSYLVANIA.

DELAY 'MECHANISM.

Application'filed March 7, 1923. Serial .No. 623,860.

This invention relates to. improvements in delay mechanisms, moreparticularly a mechanitm wl 'ch 18 electrically actuated, and isespecially adapted to use with riveting mechanism. I

In present day practice the operators of riveting machinesarelargelypaid on a piece work basis, which has a tendency to increasethe output at the cost'oi workmanship. In the actuation of pneumatic orother fluid actuated riveting machines the riveting die maybe advancedto the limit of riveting movement, but it is advisable in mostoperations that it be maintained at such limit for a su'tiic ient periodof time to permitthe rivet to set piece work system, in many in t-ances,repeatedly retract the die from rivetingposition before set of the rivetin order to speed up the operations'which resuis in improper set of therivets. requiring 'calhing ofthe riveting section. The.precentinvetioncontemplates the provision of electrically actuated mechanism, whichwill prevent the operator from retracting the die at the completion ofthe riveting stroke for a period of time which may bepredetermined oratljusted.

Other objects reside in the mechanism hereinafter described in thespecification and shown in the accompanying drawings in which- Figure 1is a side elevation of a standard type of steam actuated riveter shownwith its major axis verticallyarranged. the cylinder and a portion ofthe valve chest being .z'hown in section for convenience;

2 is a plan view on the plane 2., as dicated in Fig. 1: I i i Fig. 3is asection along the line 3, 3 0 Fig. 2. drawn toan enlarged scale;

Fig. ,4 is a vertical section along the irregular line 4, 4 of Fig. 3with parts omitted;

Fig. 5 is a front elevation of the timing mechanism i 6 is horizontalsection along the li e 6,6ot Fig. 5;

Fl,,:.. 7 is a section along the line 7 7 of J 5; I

Fig. 8 is a section along the line 88 of '8 is a section along the line"8, 8* of '8;

Operators working under the pivoted at 38 Fig. 9 is adiagrammatic viewof the :wiring connections; v

Fig. 10 is a v-iewsimilar to Fig. .1, shoW-. ing a modification; Fig. 11is a vertical section of the'locking mechanism shown in Fig. 10 takenalong the line 11, 11 of Fig. 12, drawnito an-enlarged scale; r I Fig.12 is section alongthe line.12, .12 of Fig. 11;

Fig. 13 is a section along the line 13,.13 of Fig. 12; I

14 isa cycle chart showing the .approximate relative time of variousoperations. a

Like numerals refer to like. elements throughout the drawings in which20 designates one jaw of arivetercarrying theanvil die 21. Parallelingthe vjaw 201's jaw .22,

.in which is reciprocally mounted thefriveting die 23, operatedthrough.linkimechanism generally indicated by numeral24. this bein g awell known construction known tov the art as the Hanna type. ofriveter,the .link

mechanism receiving, its actuationthrough the piston rod'25 carried byreciprocating piston 26 mountediin .thecylinder 27 .Duct

27' leads from valve chest 28 to the front end of cylinder 27 while duct2'7Pleads .to the rear end of the cylinder from valve chest 28. Thisvalve chest is provided with a source of steam or other actuating fluidindicated by numeral 30 and is provided with an exhaust port 31. A slidevalve 32 controls admission and exhaustto and-from the ends of thecylinder, as will .be obvious. This slide valve is actuated by the arm'35 carried upon shaft 35, which is oscillated or partially rotated bylever 36. operably connected to the operating handle .38 by an i-ntermediate connecting rod37,,pivotally connected at its ends to thelever .36 and handle 38 respectively. Operating handle. 38 is to the jaw22 inthe embodimentshown. It will be obvious that movement of theoperating handle 38 to the left asviewed in Figs. 1 and 3 inthedirection of the arrows, will operate to move the slide on the side ofthe valve chest 28 opposite to the lever 36, sections 10 and 10 of thecase being normally locked in enclosing position by means of padlock 41,or the like. The shaft 35 is extended into the casing 10, as shown inFigs. 2 and 1, for example, and carries thereon a rotatable ratchet cam4:5 having-a smooth portion 15* and a ratchet portion 45".Concentrically mounted on the shaft 85 are also the contact disks l6 and17 carrying contact strips 16* and 47 mounted on a segment of therespective disks. It will be noted that strip 41" begins some distanceafter the beginning of strip 46, for a purpose hereinafter described.Current leads 4.9 and 50 are attached at z, 2 to strips 46 and 17respectively.

Projecting inwardly from a frame 40 is the supporting rod '55 upon whichare mounted the contacts 56 and 57 adapted to contact with the strips16' and 4? respectively. Current leads 59 and 60 areattached at pointsand w to the contacts 56 and 5?, respectively. Located beneath cam 4-5in casing 10 is the reci nocablc locking pawl normally contactingwiththe periphery of the cam 45 and yieldingly maintained in suchcontact by the coil spring 66. Located at the bottom of the casing 10 1ssolenoid casing 70, in which is mounted solenoid coil 65', the stem ofthe pawl 65 being provided with a plunger 65*- as'indicated in Fig. 9for example, functioning in a well known manner in coaction with thesolenoid coil 65, to which current leads 71, 72 are attached at points 2and g, for example, see Fig. '9.

Located, preferably at convenient point is a'calsing' generallyindicated by numeral 80, in which is mounted the. timing mechanism. Aconvenient location for this casing is the oflice of the superintendentor foreman where the timing mechanism may be readily adjusted to varythe time, and where access by the operator, or tampering is inconvenientat all times. Mounted in the casing an electric motor 100 having apinion 101 meshing with a gear 102 on shaft 103, which in turn carries aworm 101 meshing with worm gear 105 on shaft 106, this gearingconstituting a speed reduction gearing, ts will be obvious. Theshaft 106is rotatable with gear 105, as stated,-and eX- tends through spacedsolenoid magnet coil 107 and is provided intermediate its ends with aflattened disk portion 106 The shaft 106 is extended to the front of thecasing and journaled in a frame 110 projecting inwardly from thepedestal 110. Freely rotatable upon the extended portion of shaft 106 isthe contact arm 112, provided with a counterweight 112 at its lower end,which causes the arm 112 to normally rest in the position indicated inFigs. 5 and 7, for example, against the stop pin 113. Atits upper endthe arm 112 is provided with spaced fingers 112 and 112 terminating inthe contacts 115 and 116. Current leads 118, 119 are attached at pointsr and s to the fingers 115, 116 respectively. The arm 112 is providedwith the flattened disk portion 112* at its hub portion and adjacent thedisk 106. This disk 112 is preferably formed with the serral ed fingerconstruction shown in Figs. 8 and, 8, being recessed or countcrbored at112 the recess, extending beyond the notches thus allowing access of airto the contacting surfaces, thereby substantially eliminating thegripping of the disks 106 and 112 due to the presence of oil between thesurfaces when the coupling action is not desired. shaft 106 IS thesegmental dial 120, having suitable divisions indicated thereon, theseg- Concentric with the,

ment being attached by screws or the like to the pedestal 110, see Figs.5 and 6.' Retatable upon the rod 106 is the dial arm 121 having contactelbow 122 having contacts 6 ,1? thereon. adapted. to be contacted by thecontacts or fingers 116 and 115 respectively. A current lead 125isattached to the elbow 122, see Fig. 6. for example. The arm 121 isprovided with the angularly bent clamp 121 overlying the face of thedial 120 and having an indicating tip 121. A clamping screw 135 andknurled nut 136 C0- act with the clamp 121 to clamp the arm 121 in anydesired position to the dial 120.

When current runs through the motor the same will rotate at a uniformspeed, which speed will be reduced through the gearing described aboveand transmitted at reduced ratio to the rotatable shaft 106. Uponclosing the circuit containing solenoid 107, the disk 112 will be drawninto en gagement with disk flange 106" of shaft 106,

: nism to be inthepositionillustrated in Fig.

1, movement of theoperatinghandle 38 to the left'will operate to moveslide valve through neutral position described above during which:movement the locking'pawl 65 Will ride upon the-smoothportion l5 of cam15. This :permits the lever38 tozbe moved back-and forth withoutrestraint. from neutral position-to that shown in Fig. 1. Furthermovement 'to't'heleft .brings the locking pawLinto contact withtheiratchet portion ofacam45, after which return of the operating handle38=to piston retracting po sit-ion is'impossibleuntil afterrelease ofthe pawl 65. The operator in moving the handle "38 to full open positioncauses first-the contact-*of'the-contact 56 with'the strip 46* and:later contact of contact 57' with strip 47. which throws tlie.niotor100 into circuit and operation thereof commences with consequentrotation of the shaft 106. When the second Contact.is-establishedbetween terminal "57 andflstrip 47? circuit P is closed,- whichinitiates the timing operation by 1 throwing solenoid 107 into circuitas previously described. The arm .112 is now travelin-gtoward thecontact elbow 122 and the riveting die 23 has eitherreached itsrultimateiriveting position or is approaching the same. lVhen contact isestablished :between fingers115, llfi and'the'contacts P, t circuit'Q isclosechthrowing the sol'en'oid65 into circuitand by' well known efi'ectplung er is retracted, moving-pawl tioout-of locking engagement with thecam 45; whereupon the operating handle 38, may be "removed from theposition indicated in Fig. 1, retracting the die promptly 'to'amewriveting'Oper-ation. It'will be obviousthat in theperiod oftime'during'therotationof the arm. 112 the" rivet will have had time to.set.

Normallythe return movement of'the disks 16, i? would result incontactbetweenter- :minal '57 and 'l'i 'being 'brolren beforetheIEltGhBtPOllllOl145 of cam 45 had 'passedthe pawltioea'nd this'breakingof contact woul'd break-the current through "solenoid 107, permitting 1the release of the 3 arm 112, this. in turn breakingthe circuit of thesolenoid 65 and permitting release of the.pawl:,65, which 'The firstcontact :closes circuit 0,-

would engage theratchetportion' 45 and prevent the return of valve 32 toneutral position. strip 46* has been arranged to extend beyondthestrip17 as a result of which terminal 56 will remain in contact with stripminal 5'7 .and strip 47*. As aresult of this constructionand alsothezprovision of contact between finger 116 and contact elbow 122, a newcircuit isyformed, this being the R circuit outlined above, whichincludesthe solenoid 65", which thus functions to retain the pawl 65 outof contact with the cam until the smooth portion 45* thereof overliesthe pawl. The breaking of contact between terminal 56 and strip- 16 willthen permit release of the pawl 65, which will ride upon the smoothportion ofthe cam 4'5. It will be apparent from the described mechanismthat by locating the timing mechanism at a, point inaccessible to the'operator, or looking the same to'preventsuch access, tampering withthemechanism will beprevented and'the operatormust permit suliicient setof therivets. To vary the amount of timefor such set,the arm 121 may beadjusted relative to the dial segment 120 toin- To prevent thisinterference, the

46, after breaking the contact betweentercrease or decrease the distancebetween norand -116'to travel from rest position to contact with" theelbow122. The serration or notchin'g of'thedisk'112, as shown in 'Fig.8, decrea'sesthe "possibilityof oil between the disks 112 and 106holding the same in clutched relation after thevbreaking of the circuitof solenoid 107. It sometimes happensthat due'to breaking of themechanism or the presence of a faulty rivet, or other cause. that thedelay ordinarily acquired by functioning of the timing mechanism couldbe dispensed with and forthat purpose I have provided the double poleswitch generally indicated in Fig. 9 by numeral 150. Should it becomedesirable to throw off the timing mechanism and eliminate the pawl, theoperator closes the switch completing the circu t S. which immediatelyenergizes solenoid 65 and releases the locking pawl 65. To indicate tothe foreman or superintendent. the use ofthis timing destroyer a circuitis provided including a bell 151. or the like.

which is included in circuit T. this circuit bell w ll announce to theforeman "or superintendent interference with the timing mechanism by theoperator.

In Figs; 10 to 131 have illustrated a modified form 'of'mechanism inwhich. the location of the cam contact disks etc. is dfferent from thatinv the form described .iabove,lthe function :beingotherwise identiaswill be obvious.

cal. This modified construction of operating handle 38 is pivoted asbefore upon the frame of theriveter and extends through a suitable slotin the top of casing 160, which is likewise secured to the frame of themachine being lockable in position by means of a padlock or the like,inserted through bail 161, which is carried by the frame 162 extendingoutwardly in the casing 160 fron'i the frame of the riveter. A rotatableshaft 165 is vjournaled at one extremity inthe plate 166 upon which thecasing mounted and at the other end in the plate 167 carried by andforming a part of the frame 162. The operating handle 38 is secured tothe shaft 165 and pivots about the axis thereof Secured. to the shaft165 are the contact segments 170, 171 (see Fig. 13) the former carryingcontact strip 46 the other carrying contact strip 4-7. An insulatingbushing 169 is inserted between segments 170, 171 and shaft 165. In thisconstruction the contacts 56 and 51 are located at opposite sides of theshaft 165, the strips and contacts being arranged in such wise that, asin the other construction, contact 56 wi l contact with strip 1 6 beforeestablishing contact between terminal 57 and strip 47*, the function liei'igitleiitical with that of the first described form. v

The cam 15 is also secured to the shaft 1.65 to rotate therewith, andthe locking pawl 65 underlies disk 45 as in the first form, the

solenoid case being enclosed by casing 160, as shown in the drawings.The function of this modified form being similar to that firstdescribed, it is unnecessary to further detail the operation.

In Fig. 1 1 I have diagrammatically indicated the cycle of operationsand their approximate relative time of occurence.

Itwvil] be apparent that my invention is susceptible of modification andchange and I do not wish to be restricted to'tlie form shown in thedrawings or described in the specification, except as defined in theappended claims.

/Vhat I claim is 1. In combination. riveting mechanism comprising a diereciprocable to and from riveting position, a control member, a lockingmember coactable with said member to permit movement thereof to rivetingposition and to normally prevent return therefrom. means to move saidlocking member out of locking relation after the lapse of apredetermined period of time, said last named means being,- electricallyactuated, emergency manually operable means to actuate said releasemeans and an alarm associated -with. said manually operable means tosignal the use of the same.

2. In combination, riveting ii'icchan sm, comprising a diereciprocal'ile to and from riveting position, actuating mechanismtherefor, delay mechanism coacting therewith and comprising a rotatablemember llttVlDg a ratchet portion, a locking pawl coactiug therewith topermit rotation in one direction of said lockable member to normallyprevent return rotation, a magnetic release means enacting with saidlocking pawl, timing mechanism operable to actuate said magnetic releaseafter the lapse of a predeterii'iined period of time.

4:. In con'ibination, a control member mov able to and from operatingposition, a'lockable member-rotatable therewith and pro vidcd with aratchet portion, a locking pawl normally contacting with saidratchetportion to permit movement of said control member to operatingposition and toprevent its return therefrom, a solenoid coactable withsaid pawl to withd aw the samefroni locking position, electricallyactuated timing mechanism, a source of current, means actus atcd bysaid. control member to throw said timing mechanism intocircuit.

In combination, a control member movable to and from operating position,a lockable member rotatable therewith and pro vided with a ratchetportion, a. locking pawl normally contacting with said ratchet portionto permit movement of said control member to ope ating position and toprevent its return therefrom. a solenoid coactablc with said pawl towithdraw the same from locking position, electrically actuated timingmechanisn'i, a source of current,,means actuated. by said control memberto throw said timing mechanism into circuit, said timing mechanism beingconstructed and arranged to automatically throw said solenoid intocircuit after the passage of a predeter mined period of time.

6. In combination, a control member movable to and from operatingposition, a lockable member rotated thereby, a locking ing member, asource of current, means 30- tuatable by said control member to throwsaid timing mechanism into circuit with said current source. I

7. In combination, acontrol membermovable. to and from operating;position, a lockable member rotated thereby, a locking member coactingtherewith to permit movement of said controlineiiiber in one directionand tonorinally prevent its return, an electrically actuated timingmeclianism,electrically actuated release means for said locking member,a source of current, means actuatable by said control member to throwsaid timing mechanism into circuit with said current source, said timingmechanism being operable to actuate said. release means after apredetermined period of time.

8. In combination, a control member movable to and from operatingposition, locking means associated therewith to permit movement tooperating position and to normally prevent return therefrom,electrically actir ated release means operable to release said lockingmechanism, timing mechanism com-- prising a motor and a movablecircuitmaker, a source of current, means actuated by said control memberto throw said motor into circuit with said source, a second means alsoactuated by said control member to thereafter couple said circuit-makerwith said motor, said circuit-maker, a predetermined period of timeafter said coupling ac tion, ope a'ting to actuate said releasing means.I

9. In combination, a control member movable to and from operatingposition, locking means associated therewith to permit movement tooperating position and to normally prevent return therefrom,electrically actuated release means operable to release said lockingmechanism, timing mechanism comprising a motor and a movablecircuitmalzer, a source of current. means actuated by said controlmember to throw said motor into circuit with said source, a second meansalso actuated by said control member to "thereafter couple saidcircuit-maker with said motor, said means comprising a solenoid and adisk carried by said circuitmaker.

10. In mechanism of the class described comprising a power line, amotor, a shaft actuated thereby at uniform speed, a contact arm normallyat rest, a contact elbow ad-' justable to different positions relativeto said contact arm and contactable thereby, means to throw said motorinto circuit with said line, means to couple said contact arm to saidshaft, a circuit including said arm and elbow and being closed by thecontact of the one with the other.

11. In mechanism of the class described,

a dial, an arm adjustable on said dial, a. con' comprising a solenoidand a magnetically susceptible disk carriedby said arm.

12. In mechanism of tlieclassdescribed, a source of current, a manuallyoperable controlmember movable to and-from operating position, meanscomprisinga locking member coact ing therewith to permit movement aftera predetermined period of time to throw said locking member releasemeans into circuit with said source of current.-

13. In mechanism of the class described, a. manually. operable cont-r01member, locking means coacting therewith and comprising a lockingmember, permitting movement to and preventing movement from operatingposition of said control member, electrically actuated releasing meansto move said looking member out of locking position, a rotatable shaft,a contact arm electrically actuated means to couple said arm to saidshaft and a member contactable by said contact arm: after apredetermined amount of travel thereof, said member being in circuitwith said releasing means, a source of current,

means actuatable by said control member in movement toward operatingposition to throw said coupling means into circuit with said currentsource.

14. In mechanism of the class described,

a manually operable control member, locking means coacting therewith andcomprising a locking member, permitting movement to and preventingmovement from operating position of said control member, electricallyactuatedreleasingmeans to move said looking member out of lockingposition, a rotatable shaft, a contact arm electrically actuated meansto couple said arm to said shaft and a member contactable by saidcontact arm after a predetermined amount of travel thereof, said memberbeing in circuit with said releasing means, a source of current, meansactua-table 'by said control member in movement toward operatingposition to throw said coupling means into circuit with said currentsource, an auxiliary circuit connaming a manually operable normally openswitch, said releasing means being in said last named circuit wherebyoperation of said switch will actuate said releasing means. I

15. In mechanism of the class described, a reciprocable piston, a valveoperable to control admission and exhaust to and from said cylinder, acontrol member, a cam operably attached to said control. member andhaving a contact-able portion, said contaetable por- 6 tion beingpartially toothed to form aratchet portion, a locking; member normallyeontacting said cam to permit movement thereof in one direction and toeoact with said ratchet portion to prevent movement in the oppositedirection save prior to contact with said ratchet portion, andelectrically actuated means to 'move said locking member from contactwith said cam.

In testimony whereof, I have subscribed my name.

JAMES'A. JENSEN;

